AP4305KTR-G1 - BCD Semiconductor Manufacturing Limited

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

General Description

The AP4305 is a highly integrated solution for a con-

stant voltage/constant current mode SMPS application.

The AP4305 contains one 1.21V voltage reference

with ± 0.5% accuracy, one current sensing circuit and

two operational amplifiers. Combining the voltage ref-

erence with one operational amplifier makes AP4305

an ideal voltage controller for use in adapters and bat-

tery chargers. The other low voltage reference com-

bined with the other operational amplifier makes it an

ideal current limiter for output low side current sens-

ing.

The AP4305 is available in SOT-23-6 package.

Features

·Constant Voltage and Constant Current Control

·Precision Internal Voltage Reference

·Few External Components

·Easy Compensation

·Low Supply Current: 0.5mA

·Operating Temperature Range: -40 to 105oC

Applications

·Adapters

·Battery Chargers

Figure 1. Package Type of AP4305

SOT-23-6

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Figure 2. Pin Configuration of AP4305 (Top View)

Pin Description

Pin Number Pin Name Function

CTRL Input pin of the voltage control loop

2 GND Ground

OUT Output pin. Sinking current only

CTRL Input pin of the current control loop

SENSE Input pin of the current control loop

CC Power supply

Pin Configuration

(SOT-23-6)

K Package

VCTRL

GND

VOUT

VCC

VSENSE

ICTRL

Pin 1 Dot by Marking

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Functional Block Diagram

Figure 3. Functional Block Diagram of AP4305

VCC

VOUT

GND

VSENSE

ICTRL

Package Temperature Range Part Number Marking ID Packing Type

SOT-23-6 -40 to 105oCAP4305KTR-G1 G2B Tape & Reel

Circuit Type

Package

K: SOT-23-6

G1: Green

AP4305 -

TR: Tape and Reel

Ordering Information

1.210V

200mV

VCTRL

BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Parameter Symbol Value Unit

Power Supply Voltage VCC 20 V

Input Voltage VIN -0.3 to VCC V

Junction Temperature TJ150 oC

Storage Temperature TSTG -65 to 150 oC

Lead Temperature (Soldering, 5sec) TLEAD 260 oC

Package Thermal Resistance (Junction to Case) θJC 92 oC/W

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.

These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated

under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods

may affect device reliability.

Parameter Symbol Min Max Unit

Power Supply Voltage VCC 2.5 18 V

Operating Temperature Range TA -40 105 oC

Recommended Operating Conditions

Absolute Maximum Ratings (Note 1)

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

Parameter Symbol Conditions Min Typ Max Unit

TOTAL CURRENT CONSUMPTION

Total Supply Current

Not Including the Output Sinking

Current

ICC

TA=25oC0.5 1

-40oC

105oC0.6

VOLTAGE CONTROL LOOP

Transconduction Gain (VCTRL).

Sink Current Only

Gmv

TA=25oC13.5

mA/mV

-40oC

105oC2.5

Voltage Control Loop Reference VREF

TA=25oC1.204 1.21 1.216

-40oC

105oC1.186 1.234

Input Bias Current (VCTRL)I

IBV

TA=25oC50

-40oC

105oC100

CURRENT CONTROL LOOP

Transconduction Gain (ICTRL).

Sink Current Only Gmi TA=25oC1.5 7 mA/mV

Current Control Loop Reference VSENSE

IOUT=2.5mA, TA

5oC198 200 202

IOUT=2.5mA, -40oC

105oC192 208

Current Out of Pin ICTRL at 200mV IIBI

TA=25oC25

µA

-40oC

105oC50

OUTPUT STAGE

Low Output Voltage at 10mA

Sinking Current VOL TA=25oC200 mV

Output Short Circuit Current.

Output to VCC, Sink Current Only IOS

TA=25oC27 50

-40oC

105oC35

(VCC=5V, TA=25oC, unless otherwise specified.)

Electrical Characteristics

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Performance Characteristics

Figure 4. V

REF

vs. Ambient Temperature

Figure 5. VSENSE vs. Ambient Temperature

Figure 6. IIBV vs. Ambient Temperature Figure 7. IIBI vs. Ambient Temperature

-40-200 20406080100120

1.190

1.195

1.200

1.205

1.210

1.215

1.220

VREF (V)

Ambient Temperature (oC)

-40 -20 0 20 40 60 80 100 120

-20

100

VCC=12V

VCC=5V

VCC=2.5V

IIBV (nA)

Ambient Temperature (oC)

-40-200 20406080100120

VCC=12V

VCC=5V

VCC=2.5V

IIBI (µA)

Ambient Temperature (oC)

-40 -20 0 20 40 60 80 100 120

198

199

200

201

202

203

VCC=12V

VCC=5V

VCC=2.5V

VSENSE (mV)

Ambient Temperature (oC)

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Performance Characteristics (Continued)

Figure 8. Output Short Circuit Current vs. Figure 9. Supply Current vs. Ambient Temperature

Ambient Temperature

-40 -20 0 20 40 60 80 100 120

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

VCC=12V

VCC=5V

VCC=2.5V

Supply Current (mA)

Ambient Temperature (oC)

-40 -20 0 20 40 60 80 100 120

VCC=12V

VCC=5V

VCC=2.5V

Output Short Circuit Current (mA)

Ambient Temperature (oC)

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Application

1.210V

VCC

VOUT

GND

VSENSE

ICTRL

Rss

To primary

VOUT+

VOUT-

Load

500

VCTRL

AP4305

Figure 10. Typical Application 1 of AP4305

(V)

(A)

SENSE

itCurrentLim =

VV REFOUT

×=

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Application (Continued)

1.210V

VCC

VOUT

GND

VSENSE

ICTRL

Rss

To primary

VOUT+

VOUT-

Load

500

VCTRL

AP4305

Figure 11. Typical Application 2 of AP4305

(V)

(A)

SENSE

itCurrentLim =

)(

)]([ SSLSSLREF

ORI

RIVV ×−

××+=

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

Typical Application (Continued)

1.210V

VCC

VOUT

GND

VSENSE

ICTRL

Rss

To primary

VOUT+

VOUT-

Load

500

VCTRL

AP4305

Figure 12. Typical Application 3 of AP4305

(V)

(A)

()

SSREFSENSE

REFSENSE

RVV

itCurrentLim

×+

)(

SSLREFOUT RI

VV ×−

×=

May 2010 Rev. 2. 0 BCD Semiconductor Manufacturing Limited

Data Sheet

CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER AP4305

Mechanical Dimensions

SOT-23-6 Unit: mm(inch)

2.820(0.111)

3.020(0.119)

2.650(0.104)

2.950(0.116)

1.500(0.059)

1.700(0.067)

0.950(0.037)TYP

1.800(0.071)

2.000(0.079)

0.300(0.012)

0.400(0.016)

0.700(0.028)REF

0.100(0.004)

0.200(0.008)

0°

8°

0.200(0.008)

0.300(0.012)

0.600(0.024)

0.000(0.000)

0.150(0.006)

0.900(0.035)

1.300(0.051)

1.450(0.057)

MAX

123

Pin 1 Dot by Marking

IMPORTANT NOTICE

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-

cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility fo r use of any its products for any

particular purpose, nor does BCD Semiconductor Man ufacturing Limited assume any liability arising out of the application or use

of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or

other rights nor the rights of others.

- Wafer Fab

Shanghai SIM-BCD Semiconductor Manufacturing Limited

800, Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6485 1491, Fax: +86-21-5450 0008

BCD Semiconductor Manufacturing Limited

MAIN SITE

REGIONAL SALES OFFICE

Shenzhen Office

Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office

Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office

Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China

Tel: +86-755-8826 7951

Fax: +86-755-8826 7865

Taiwan Office

BCD Semiconductor (Taiwan) Company Limited

4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,

Taiwan

Tel: +886-2-2656 2808

Fax: +886-2-2656 2806

USA Office

BCD Semiconductor Corporation

30920 Huntwood Ave. Hayward,

CA 94544, U.S.A

Tel : +1-510-324-2988

Fax: +1-510-324-2788

- IC Design Group

Advanced Analog Circuits (Shanghai) Corporation

8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6495 9539, Fax: +86-21-6485 9673

BCD Semiconductor Manufacturing Limited

http://www.bcdsemi.com

BCD Semiconductor Manufacturing Limited

IMPORTANT NOTICE

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-

cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any

particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or

other rights nor the rights of others.

- Wafer Fab

Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.

800 Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6485 1491, Fax: +86-21-5450 0008

MAIN SITE

REGIONAL SALES OFFICE

Shenzhen Office

Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office

Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen,

China

Tel: +86-755-8826 7951

Fax: +86-755-8826 7865

Taiwan Office

BCD Semiconductor (Taiwan) Company Limited

4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,

Taiwan

Tel: +886-2-2656 2808

Fax: +886-2-2656 2806

USA Office

BCD Semiconductor Corp.

30920 Huntwood Ave. Hayward,

CA 94544, USA

Tel : +1-510-324-2988

Fax: +1-510-324-2788

- Headquarters

BCD Semiconductor Manufacturing Limited

No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China

Tel: +86-21-24162266, Fax: +86-21-24162277